A deck installer checks the fastening plan: a project records 4 recordable cases over 85,000 work hours. Using the 200,000-hour multiplier, what incident rate is closest?
Correct Answer
D) 9.4
The calculation gives 9.4 for the stated incident rate. Other choices: the distractors come from omitting an adjustment, using the wrong rate, or applying a rounded shortcut for calculation item 177.
Why This Is the Correct Answer
The calculation gives 9.4 for the stated incident rate.
Why the Other Options Are Wrong
Option A: 9.4 (unadjusted)
incident rate, choice a: 9.4 (unadjusted) repeats the numeric result but changes the required label or rounding; 4 x 200000 / 200,000 = 4. so the keyed form is 9.4.
Option B: 8
incident rate, choice c: 8 backs into 8 when divided by 200000 / 200000; the accepted setup gives 9.4 on that same base.
Option C: 10
incident rate, choice d: 10 backs into 10 when divided by 200000 / 200000; the accepted setup gives 9.4 on that same base.
Memory Technique
Picture a ledger line labeled incident rate: finish every operation before accepting 9.4.
Reference Hint
Open 29 CFR 1926 OSHA Construction Standards; use the index entry or section for "incident rate calculation" to confirm that The calculation gives 9.4 for the stated incident rate.
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